Antislip material



Qrncc Patented June 9, 1925. I

UNITED STATES Reference PATENT OFFICE.

OTIS HUTCHINS, OF NIAGARA FALLS, NEW YORK, ASSIGNOR TO THE CARBORUNDUM COMPANY, OF NIAGARA FALLS, NEW YORK, A"CORPORATION OF PENNSYLVANIA.

ANTISLIZP MATERIAL.

No Drawing.

To all whom it may concern.

Be it known that I, One HUTCHINS, a citizen of the United States, residing at Niagara Falls, in the county of Niagara and State of New York, have invented a new and useful Improvement in Antislip Material, of which the following is a full, clear, and exact description.

My invention relates to the manufacture of antislip material to be'used in antislip floors or treads. The object of the invention is to provide abrasive fragments of a type which will resist the tendency to work out of their setting or matrix and yet give the antislip qualities desired in the tread or floor surface.

In my copending application, Serial No. 572,727, filed July 3, 1922,-I describe a method of making porous alumina fragments, which fragments I have found to possess the highly desirable characteristics for antislip floors and treads.

In making these fragments, as set forth in said application, I preferably melt alumi us material in an electric furnace of the arc type, tap out the material while gases of reduction are being evolved, and uench the material as it is tapped out, practically instantaneously by water. The material thus formed is of a highlygporpus honeycomb nature containing pore cells of a spheroidal character separated from each il1,g, and this wash may be again other by very thin walls or partitions. The and rubbed down. alumina crystals in the material thus pro (luced are extremely small in size, being I have found that fra rial are extremely efiicient in antislip floor Application med June 28,

sixteenth of an inc gTlpllmlmwylishmugt, as desired. e ragments may also be used in the manufacture of tile, using a vitrified binder, and are well adapted for all kinds of bonding agents used in flooring constructions, such as magnesium oxychloride, ceramic bonds, rubber .bonds, and the like.

The advantages of my invention will be obvious to those skilled in the art. The material may be cheaply made, as it only requires crushing to the desired size after being taken out of the furnace and quenched. Its culiar porous character gives a strong bon with the matrix material, while at the same time it maintains its antislip properties. I have used the -p shedmaterial ranging from three-eigx ths of an inch to onep and mixed it in cement sidewalks and ordinary pavements with the M 1922. 8eria11jIo.571,571. /U a,

Examiner regular mixture of cemented aggregates in" such as Portland cement, either with or without the addition of arble r other stone chips. A wash of P0 and cement may be flushed over the surface after grind- Changes may be made in the size of the fragments, in the material of the mix and ents of this mateinvention.

I claim:

generally not over .005 inch in diamete\product etc., without departingfrom my treads and surfaces. The material has a porosity of 35 per cent or more and the pore cells are of relatively greater size than the alumina crystals, these cells varying in size from one-fourth of an inch or more and the fragments.

down to less than one-hundredth of an inch.

The fragments adhere 'strongly'to the all. types of floors; .for' example, in Jerrazzo with Portland cement.

fiooring, with lor without marble chips and e sur ace may be 1. An antislip floor or tread having empolished bedded therein fragments of aluminous abrasive material having a porosity greater than 25 per cent.

2. An antislip floor or tread surface having cement with fragments embedded therein, said fra ents being broken portions of fused alumina masses having a porosity of at least 25 per cent.

3. An antislip floor or tread having embedded therein fragments of fused alumina containing spheroidal pores of relatively greater size than the alumina crystals of the fragments.

4. An antislip floor or tread surface of cement with fragments embedded therein of fused and quenched alumina masses having aluminous abrasive material at least in a highly porous honeycomb structure condiameter and having a porosity greater than taining cells of spheroidal character se twen y-five per cent, said fragments being 10 arated from each other by very thm bonded by a suitable bonding material.

5 partitions. In testimony whereof I have hereunto set 5. An antislip floor or tread surface havmy hand. ing imbedded therein fragments of fused OTIS HUTQHINS. 

